In SHARK, when dealing with condensers, only the condensation process is considered in the calculation, because it is the phase that most significantly influences the global heat transfer coefficient.
In SHARK, the desuperheating value is only used for determining the refrigerant mass flow rate; it does not affect the overall heat exchange calculation, which is dominated by the condensation phase. This explains why changing the desuperheating value in your simulation does not change the output results for condenser performance.